Here is the full list of all 80 Mount & Blade: Warband achievements. It takes around 150-200 hours to unlock all of the achievements on Windows.
(MP) Win one round in battle mode.
Kill 75 enemies with horse archery.
Land a shot with a difficulty of 5 while using a throwing weapon.
Have a 7 in one of the following skills or a 5 in two; Tracking, Path-finding, or Spotting.
Get a character to elope.
Rule all of Calradia!
Put a pretender on their rightful throne.
Assist your faction in conquering Calradia.
You have completed the following achievements: Mace in yer Face!, Spoil the Charge, Agile Warrior, and This is our land.
You have completed the following achievements: Melee Master, Knights of the Round, Every breath you take, I dub thee/Good Samaritan.
You have completed the following achievements: Trick Shot, Khaaan!, Agile Warrior, and Harassing Horseman.
As a female character, help a female claimant reclaim her throne.
As a female character, become queen of all Calradia.
Kill 75 enemies with throwing weapons.
Defeat 10 enemy parties in the snowy regions of Calradia.
Land a shot with a difficulty of 10 while using a bow and arrow.
Land a shot with a difficulty of 6 while using a crossbow.
Kill 10 parties of Mountain Bandits.
Make one of your melee weapon skills 250.
Make one of your ranged weapon skills 250.
Visit every major town in Calradia.
Be chosen as marshall.
As a female character get into a duel with male lord by insulting him.
Pick a fight with a lord by insulting him or by challenging him to a duel.
As a female character, Capture and sell three NPC lords.
As a female character, give a companion character a great sword.
As a ruler conquer 10 towns or castles.
As a ruler have 3 vassals.
Promote one of your followers into a position of power.
Make your own faction.
As a female character, make your own faction.
Kill 10 enemies with a throwing weapon's secondary function.
Get one of your healing skills to 5.
Get either two strength related skills to 5 or one to 7.
Amass a fortune of 100,000 denars.
As a female character, raise your renown to 50.
Kill 50 men as a female character.
Successfully defend a castle.
You and your army have killed or wounded 5,000 enemy troops.
Become the owner of at least 5 fiefs.
Win a battle against a lord or party who previously beat or captured you.
Face off against 100 enemies using custom battle mode.
Install and play one mod.
Finish reading one book through the camping screen.
Get Married.
Get the engineering skill up to 5.
Get either two agility related skills to 5 or one to 7.
Have two of the following skills at a 5; Looting, Inventory Management, Trade, or Prisoner Management.
Have two of the following skills at a 5; Trainer, Tactics, Leadership, or Persuasion.
Kill or wound at least 500 enemies.
Learn 3 poems from tavern bards.
Raise your soldiers' morale from low to excellent.
Be granted your first fief.
Sell 5 people to the ransom broker.
Steal 3 cattle from a single village.
Help a lord or party win a fight.
Enter and win a tournament.
Recruit 6 hero characters.
Harass wondering peasants on the map.
Raid 3 caravans and raid 3 villages.
Camp in the Sarranid region of the map.
Eat 6 different types food concurrently.
Have a -50 relation with a lord, village, or faction.
Engage in a conversation with a hero character through the party screen.
Cleanse the town of bandits in the opening mission.
(MP) Your team successfully defended a castle in siege battle mode.
(MP) Kill 50 cavalry while on foot, the enemy must be killed while mounted.
(MP) Kill 100 people with mounted projectiles.
(MP) Kill 25 people with throwing weapons.
(MP) Perform 25 lance kills while mounted.
(MP) In any multiplayer mode have more kills than deaths.
(MP) Slay 50 foes with slashing weapons.
(MP) Kill 25 foes with a blunt weapon.
(MP) Kill 50 foes with throwing axes.
(MP) Win in Conquest mode.
(MP) Win a round of team deathmatch mode.
(MP) Win a round of deathmatch mode.
You have completed the following achievements: Might makes Right, The Huscarl, Melee Master/Dexterous Dastard, and Holy Diver/Elite Warrior.
You have completed the following achievements: Abudant Feast, Mace in yer Face!, Sarranidian Nights, and Art of War/Melee Master.
You have completed the following achievements: Might Makes Right, Choppy Chop Chop, Glorious Mother Faction, and Old school Sniper.